JPH07259211A - Blocking type fire-proof construction and its work method - Google Patents

Abstract

PURPOSE:To prevent the spread burning to adjacent districts, even if a through member which passes through the divided structural body of a building is deformed by heath, producing a clearance around the through member, by filling the clearance. CONSTITUTION:A through member 3 such as a cable, pipe is inserted in an opening 2 formed in a divided structural body which is separated from the other section of a building. Then a foamed or unfoamed filling material 7 of which volume is expanded by heating is filled between the inner periphery of the opening 2 and the through member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an obstructive fireproof structure and a construction method thereof.

[0002]

2. Description of the Related Art Floors and walls, which are fire-resistant sections of buildings such as high-rise houses and office buildings, are used as openings for the penetration of cables such as power and communication, water supply and drainage pipes, ducts, and refrigerant pipes for air conditioning. Is constructed based on a fireproof construction method that uses a fireproof filler made of a refractory material in the openings that pass through these, and when a fire occurs, a fireproof structure that prevents the fire from entering other adjacent areas and prevents the spread of fire. Has been adopted.

In the above conventional fireproof structure, generally, a penetrating member insertion hole provided in a plate material made of a refractory material is inserted through a penetrating member such as a cable or a pipe, and then a fireproof heat insulating material such as rockol is filled between the plate materials. However, since the filling of such a fire resistant heat insulating material is performed manually, the filling state tends to vary depending on the operator, and sufficient fire protection may not be obtained.

From the above, for example, Japanese Patent Laid-Open No. 4-65
The present inventors have developed and provided a filler for preventing the spread of fire as seen in Japanese Patent No. 340. This filler is made of rock wool, slag wool, alumina silicate fiber,
Silica fiber, alumina fiber, zirconia fiber, glass fiber, etc. alone or in combination with refractory fiber selected from these, bauxite, alumina, chamotte, loastone, blended with refractory powder such as silica sand The refractory material kneaded with water is filled so that the filling property can be made uniform.

[0005]

However, according to the above conventional filler, if the penetrating member is empty like an electric wire,
Even if the insulating material is softened and deformed by heat, or if it is thermally decomposed, no gap is created immediately around it, so filling the filler as described above can sufficiently clear the fire resistance test. When a hollow member such as a pipe or refrigerant pipe is used as a duct, when the penetrating member is thermally deformed in the event of a fire, the filling material has already hardened and its shape is fixed, so a large gap is created between the penetrating member. Occurs,
There was a risk that flames would leak from this gap and spread to other adjacent areas.

In view of this, the present invention takes into consideration the situation that even if the penetrating member is deformed by heat to create a gap between the penetrating member and the filling material, the filling material expands in volume by heat and fills the gap. It is an object of the present invention to provide an obstructive fireproof structure capable of surely preventing a flame from leaking to another adjacent section and preventing a fire from spreading, and a construction method thereof.

[0007]

As a means for solving the problems of the above-mentioned prior art, the present invention is to penetrate an electric wire, a pipe, etc. through an opening formed in a partition structure with another partition of a building. A occlusive fireproof structure, characterized in that a molded article including a sheet shape that expands in volume by heating or an amorphous occluding material is inserted between the inner periphery of the opening and the penetrating member, and the same. It is in the construction method.

[0008]

[Function] When a fire occurs in one compartment, and the heat causes thermal deformation of the penetrating member, the thermal expansion material (microbeads) compounded in the occluding material is softened and expanded by the surrounding heat, As a result, the entire occluding material expands in volume and goes to the gap created by the deformation of the penetrating member, or toward the penetrating member that is softened by heat and can be deformed with a small force, and the penetrating member is crushed to form a gap. Prevents the spread of flames to other areas and prevents the spread of fire.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a cross section of an embodiment in which the present invention is applied to a concrete floor 1 which is one of the partitioned structures with other partitions of a building. A vinyl chloride pipe 3 (penetrating member) of 50φ is vertically inserted through the opening 2 as an example.

A receiving portion 4 is provided so as to project from the inner periphery of the lower portion of the opening 2, and the vinyl chloride pipe 3 is provided in the center of the inside of the opening 2.
A plate member 6 made of a refractory material having a penetrating member insertion hole 5 through which the hole is inserted as closely as possible is inserted and supported by the receiving portion 4.

Examples of the material of the plate material 6 include rock wool board, calcium silicate board, ceramic fiber board, ceramic material such as molded body as disclosed in JP-A-3-257079, steel plate, aluminum decorative board and the like. A metal plate is used, and in the case of a ceramic material, in order to reinforce the strength, means such as laminating a metal plate material on the outer surface side, forming a beam (rib), incorporating an aggregate made of a metal rod material, etc. Good.

On the plate material 6 made of refractory material in the opening 2, a closure material 7 is provided so as to surround the circumference of the vinyl chloride pipe 3.
Has been charged.

The plug 7 is made of refractory powder (for example, Al ₂ O ₃ , Al ₂ O ₃ -SiO ₂ , MgO, silica stone,
SiO ₂ , ZrO ₂ , Zircon, graphite, SiC, S
i ₃ N ₄ , various clays), refractory fibers (for example, glass fiber, glass wool, rock wool, ceramic fiber, Al ₂ O ₃ fiber, ZrO ₂ fiber, SiO ₂ fiber, inorganic fiber such as carbon fiber, kinol fiber, Polyamide fiber, organic fiber such as callose fiber) as a main raw material and 0.2 to 20% of heat-expandable microbeads are mixed, and a vinyl acetate resin emulsion as a binder, and an aqueous emulsion thereof as a rubber latex, For example, ethylene vinyl acetate emulsion, vinyl acetate-acrylic acid ester emulsion, styrene-butadiene latex, acrylonitrile butadiene latex and the like are mixed singly or in combination to form a heat resistant composition having a resin content of 3 to 50%. .

The above-mentioned closing member 7 is a molded product which is molded into a predetermined shape in advance as shown in FIG. 2, or is applied in a putty-like indefinite shape. In the case of a molded product, as shown in FIG. 2 (A), there is an integrally formed product having a hole 5 through which a penetrating member passes, and as shown in FIG. 2 (B), it has a split shape. In this case, the diameter D of the occluding member 7 is at least D when the diameter is a for a relatively hard material such as the vinyl chloride pipe 3 as the penetrating member shown in this embodiment.
= 3a, preferably D = 4a, and the height H is at least a. If the size is smaller than the above-mentioned size, there is a possibility that when the vinyl chloride pipe 3 is deformed by heat, it is insufficient to close the gap generated by the deformation. If D = 3a, the cross-sectional area is 8 times, and the occluding property can be sufficiently satisfied.

The occluding material 7 is not limited to a circular outer shape as shown in FIG. 2, but may be a square shape.
In this case, one side thereof is 3a to 4a. These are also applied to the dimensions when the irregularly shaped closing material 7 is filled.

The heat-expandable micro beads are, for example, 1
It is preferable to use a particle having a particle size of about 0 to 40 μm and a low boiling point hydrocarbon enclosed in a shell.
It expands from 0 to 70 times (volume).

Since the vinyl chloride pipe 3 starts to soften at about 80 ° C., the expansion start temperature of the plug 7 is 100 to 100 ° C.
The temperature is set to about 180 ° C, preferably 1
It is preferably 30 to 180 ° C. This is a block 7
This is because when it is previously formed as a molded product, it needs to be processed into a predetermined shape and then dried, so that it does not expand before use. A plurality of types of microbeads having different expansion peak temperatures may be mixed and used.

The above-mentioned molded product or irregular-shaped occluding material 7 is applied around the vinyl chloride pipe 3 in the opening 2, and then the remaining space around the occluding material 7 is filled with the above-mentioned conventional material. Filling with a fire spread prevention filler 8 as shown in
A refractory plate material 9 made of the same material as the plate material 6 is covered from the upper surface side of the floor 1 with a size larger than the opening surface of the opening 2, and is fixed to the floor 1 by a fixing means such as a bolt 10. In this case, it is desirable to firmly fix the occluding material 7 so that it cannot be lifted when it is thermally expanded.

FIG. 3 shows an example in which three vinyl chloride pipes 3, 3, 3 are inserted, and FIG. 4 shows a vinyl chloride pipe 3 and an electric wire 1.
1 shows an example in which 1 and 2 are inserted, and both are constructed as in Examples described later. Further, even when the partition structure of the target building is a wall, the construction can be performed in the same manner as in the case of the floor 1.

When the penetrating member is an air conditioning refrigerant pipe,
A heat insulating material such as foamed polyethylene is wound around a steel pipe through which the refrigerant passes. In such a case, since the softening when receiving heat is remarkable, the diameter D of the closing member 7 is set to the refrigerant pipes 3a, 3a.
Even if it is about twice the outer diameter, it can be sufficiently closed. However, since the two refrigerant pipes 3a, 3a are normally used for reciprocating, the y dimension is a, that is, D = 3a as shown in FIG.
It is good to keep it. In this case, the cross-sectional area of the blocking member 7 is 4.5 times that of the refrigerant pipes 3a, 3a.

Next, specific examples will be described. (Example 1) 92% of refractory powder, 5% of refractory clay, and 3% of glass fiber were blended as the occluding material 7, 3% of heat-expandable microbeads were further added, and ethylene vinyl acetate resin emulsion was used as a resin component. Add 18% and knead,
It was filled in a forming frame in which a hole was formed in a portion through which the penetrating member passes, and was dried at 85 ° C. for 2 hours to maintain its shape, thereby obtaining a occluding member 7 having a split shape.

As shown in FIG. 1, a ceramic fiber board is used as the fire-resistant plate material 6 constituting the bottom portion, and the occluding material 7 is arranged around the vinyl chloride pipe 3 which is a penetrating member, and a space portion around the occluding material. The filler 8 for preventing the spread of fire was kneaded with water and poured in, and an iron plate was used as a plate material 9 made of a refractory material on the upper surface, and anchor bolts 10, 10 were fixed to the floor 1 by driving.

The simulated construction body assembled as described above was heated in a heating pattern according to the fire resistance test method for 2 hours according to the fire resistance performance test method defined in the Building Standards Law. According to the observation after the heating was completed, the gap due to the thermal deformation of the vinyl chloride pipe of 50φ was completely closed. (Example 2) As the blocking material 7, 92% of refractory powder, 5% of refractory clay and 3% of glass fiber were mixed, and further 3% of thermal expansion microbeads were added thereto to prepare an ethylene vinyl acetate resin emulsion as a resin component. %, Added and kneaded, put in an extrusion container, and used as a plugging material for on-site filling construction with a grease gun.

As shown in FIG. 3, a calcium silicate plate is used as the plate material 6 made of refractory material which constitutes the bottom, and separate pieces 12, 12 are fixed to the lower surface of the floor 1 with bolts 13, 13. The plate member 6 is placed on the receiving portion, and the vacuum forming block 14 using the ceramic fiber is attached to the vinyl chloride pipes 3, 3, 3
Is placed on the plate member 6 so that a space corresponding to the diameter of the vinyl chloride pipe is left around, and then the blocking member 7 is provided between the periphery of the vinyl chloride pipes 3, 3, 3 and the vacuum forming block 14. In the arrangement direction of the vinyl chloride pipes, the diameters of the vinyl chloride pipes are filled on both sides, and in the direction perpendicular to the arrangement direction, the diameter is 1.5 times as much as a precaution, and a rectangular shape is filled. The fire-resistant plate material 9 was fixed to the upper part with bolts 10 to prepare a simulated construction body. In this case, if at least a space corresponding to the pipe diameter is not provided between the adjacent vinyl chloride pipes 3 and 3, there is a possibility that the construction will be incomplete regardless of whether the occluding member 7 has a regular shape or an irregular shape. It is good to set it to about 5 times.
When the above-mentioned construction body was heated by the same heating pattern as in Example 1, three vinyl chloride pipes of 50φ 3, 3, 3
It was possible to prevent the formation of a gap in the through portion of the. (Example 3) 85% of refractory powder, 5% of refractory viscosity and 10% of ceramic fiber were blended as the plugging material 7, 2% of heat-expandable micro beads were further added, and ethylene vinyl acetate resin emulsion was used as a resin component. 18% added and kneaded, filled in a molding frame in which a hole through which a penetrating member is formed and heated at 85 ° C. for 2 hours to dry enough to retain the shape, and a occluded material having a split shape It was set to 7.

Then, as shown in FIG. 4, a ceramic fiber board is used for the plate material 6 made of refractory material which constitutes the bottom.
A piece 15 having a substantially Z-shaped cross section is fixed with bolts 10 and 10, the lower end thereof is used as a receiving portion 4 and 4, and the plate member 6 is placed on the plate member 6, and a closing member 7 is arranged on the plate member 6. A thin wrap film was put on the occluding material 7 to make it waterproof, and then the castable 16 for fire protection was poured into the occluding material 7 to make a simulated construction body.
When this construction was heated with the same heating pattern as in Example 1, not only the electric wire 11 but also a gap in the penetration portion of the vinyl chloride pipe 3 of 50φ was not observed. (Example 4) 92% of fire resistant powder, 5% of fire resistant clay and 3% of glass fiber were blended as the occluding material 7, 4% of heat-expandable micro beads were further added, and 21% of ethylene vinyl acetate resin was added. After kneading, this was put into an extrusion container and used as an occluding material for on-site filling construction. This plugging material is filled in a portion through which the two refrigerant pipes 3a, 3a as shown in FIG. 5 pass, as shown in the cross section in FIG. 6, and the spreading material 8 for spreading fire is applied on the waterproof wrap film on the upper surface thereof. did. The same members as those in FIG. 1 are designated by the same reference numerals.

When heated in the same manner as in the first embodiment, the portion of the heat insulating material made of foamed polyethylene on the outer circumference of the refrigerant pipes 3a, 3a is covered with the expansive closing material 7 over the entire surface. Even with the piping having the above, it was possible to obtain a sufficient effect of preventing the spread of fire. (Example 5) The expansive occluding material 7 prepared as in Example 4 was formed into a sheet having a thickness of 2 mm, and the sheet was heated at 80 ° C for 1 hour.
After being dried for 2 hours to form a flexible sheet 7a, the sheet 7a is wound around the refrigerant pipes 3a and 3a as shown in FIG. 7 and set as shown in FIG. 8, and in the gap between the refrigerant pipes 3a and 3a. A piece 7b obtained by cutting the sheet 7a was packed and constructed. The same members as those in FIG. 6 are designated by the same reference numerals. Also in this embodiment, the fire spread prevention effect equivalent to that in the above-mentioned Embodiment 4 could be obtained.

[0027]

As described above, according to the present invention, even if a penetrating member that penetrates a partition structure that constitutes a fireproof partition with another partition of a building is deformed by heat from a fire, it is loaded around the partition member. The plugging material expands volumetrically due to heat and follows, and no gap is created around the penetrating member, which reliably prevents flame from penetrating from the insertion part of the penetrating member to other compartments and spreads the fire. Can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment in which the present invention is applied to a floor of a building.

2 (A) and 2 (B) are perspective views showing a shape example in the case where the blocking member in FIG. 1 is a molded product.

FIG. 3 is a sectional view showing a modified example of the present invention.

FIG. 4 is a sectional view showing another modification of the same.

FIG. 5 is an explanatory diagram showing a relationship between a blocker and a pipe when the present invention is applied to a refrigerant pipe.

FIG. 6 is a sectional view showing an example of construction.

FIG. 7 is a perspective view showing another modification.

FIG. 8 is a sectional view showing a construction example of the same.

[Explanation of symbols]

 1 Floor (compartment structure) 2 Opening 3 Vinyl chloride pipe as a penetrating member 3a Refrigerant pipe as a penetrating member 4 Receiving part 6,9 Refractory plate material 7 Closing material 7a Sheet-like blocking material 8 Spreading prevention plug Material 16 Fireproof castable

Claims (5)

[Claims] 1. A penetrating member such as an electric wire or a pipe is inserted into an opening formed in a partition structure of another partition of a building, and a volume is generated by heating between an inner periphery of the opening and the penetrating member. An occlusive fireproof structure characterized by being filled with an expandable molded product or an amorphous occlusive material. 2. A refractory plate material having a penetrating member insertion hole for penetrating a penetrating member such as an electric wire or a pipe is provided on both sides of an opening formed in a partition structure with another partition of a building. , A molded product or an amorphous blocker that expands in volume by heating is loaded into the space formed by these plate members and penetrating members,
A occlusive fireproof structure characterized in that the occlusive material is expanded in volume only toward the penetrating member. 3. The occlusive fireproof structure according to claim 1, wherein an occluding material which expands in volume by heating is formed in a sheet shape, and the sheet is wound around an outer periphery of the penetrating member of the partition structure penetrating portion. 4. A flame-retardant powder and a fire-resistant fiber as main materials, 0.2 to 20% of thermally expandable microbeads, and a vinyl acetate resin emulsion and / or 3 to 50% of resin component of rubber latex as a binder. The occlusive fireproof structure according to any one of claims 1 to 3, wherein the occlusive material is used as a molded product or an amorphous shape. 5. A refractory plate material having a through-member insertion hole is provided by projecting a receiving portion on an opening edge on one surface side of an opening formed in a division structure with another division of a building. Then, the through hole, such as an electric wire or a pipe, is inserted through the insertion hole, and a molded product or an amorphous blocker that expands in volume by heating is loaded into the opening, and then the outer surface side of the opening. A method for constructing an obstructive fireproof structure, characterized in that a fireproof structure is formed by fixing a plate material made of a refractory material inserted into the penetrating member to the above.